str1 = 'aa'
str2 = 'bb'

list1 = [1, 2]
list2 = [10, 20]

t1 = (1, 2)
t2 = (10, 20)

dict1 = {'name': 'Python'}
dict2 = {'age': 30}

# +: 合并
print(str1 + str2) #aabb
print(list1 + list2)  #[1,2,10,20]
print(t1 + t2)#(1,2,10,20)

"""
    print(dict1 + dict2)  # 报错：字典不支持合并运算
          ~~~~~~^~~~~~~
TypeError: unsupported operand type(s) for +: 'dict' and 'dict'

"""
print(dict1 + dict2)  # 报错：字典不支持合并运算




